. Author manuscript; available in PMC: 2013 Jul 10.

Published in final edited form as: Breast Cancer Res Treat. 2007 Oct 5;111(2):289–296. doi: 10.1007/s10549-007-9775-5

Table 3.

Association of BBD categories with risk level, age and ethnicity

	SBBD n = 1362	HBBD n = 2979	Odds Ratio	95% CI
Risk Level ^†
Risk 1	910 (66.8)	749 (25.1)	1	Referent
Risk 2	436 (32.0)	2006 (67.3)	5.59	4.85 to 6.44
Risk 3	16 (1.2)	224 (7.5)	17.0	10.2 to 28.5
Age
≤45 years	918 (67.4)	1317 (44.2)	1	Referent
46–55 years	174 (12.8)	778 (26.1)	3.12	2.59 to 3.75
>55 years	270 (19.8)	884 (29.7)	2.28	1.94 to 2.68
Ethnicity
African American	467 (34.3)	741 (24.9)	1	Referent
Caucasian	895 (65.7)	2238 (75.1)	1.57	1.37 to 1.81

^†

Risk: The lesion(s) occupied the highest risk level in a BBD biopsy.